Antifriction side bearing.



A. W. CALVIN.

. ANTIFRICTION smE BEARING.

APPLICATION FILED JULY l0, l9I8.-

Patented Got. 28, 1919.

s4 a 4 j l G 4 2l J 1 Ea my av/ y /1/ :a INVENTOR.

ALBERT w. CALVIN, or `PrrrseUae-H, PNNSYLVANIA.

Lajaoaaa..

To all whom it may concern:

Be it known that l, ALBERT W. EMWIN, a citizen of the United States, anda resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful improvements inAntifriction Side Bearings, of" `which the following is a specication.

My invention relates to anti-friction side bearings for cars used onsteam, electric, lor

other railways.l

'One object of the a side bearing in which provision is made for thefull angular movement of the car holsters witha dilierential lateralmovement of the anti-friction member of the side'bearnother object ofthe invention isv to pro- .vide a side bearingin which the bearingsurfaces arel straight from end' to end and movable members of thebearing from high grade rolled or forged steel and from steel of stocksizes is made possible.

- Another objectl of the invention is lto provide an anti-friction sidebearing for railf way cars having a balanced roller with a gravityreturn roller adapted'to engage with and automatically maintain thebalanced roller in a substantially central position on' the lowerbearing plate of the sidefbearing. further object of myinvention is toprovide a side bearing having novel features of'constructin whereby thebearing is made applicableifor use on holsters.

A still further object ofv my invention is both truck or body theprovision of an anti-friction sidefbearing having the novelconstructions, combinations andl arrangement of' parts' shown in thedrawings, to be described indetail hereinafter, and to be particularlyspecitied in tlie appended claims.: f 7 Referring nowtof the drawings,'forming part oflthis specification, Figure lis anfend elevation, partlyin'section of my improved bearing, the section being taken on the line-of Fig. 2.1 p l 'SFig. 2 isla side elevation of the saine, partly insection,` the section being taken on tlileline lr-H of Figfl.,v a

Figi' S* is a side elevation, partly broken ing, in which. the bearingcage 'is ,secured'to' the truck bolster,'instead df as 1n Figs. 1

and2, to the. body bolster. of a railway car.

invention is to provide f wherein the formation of the relativelyvSpecification of Letters Patent. Patented 01615. 19H19.

Application sied .my 1o, 191e. serial No. 244,245. l

being taken on the line IV+lVof Fig; 3.

In the accompanying drawings;-` vaside bearingembodying my invention isshown operatively mounted between opposite "end portions Qvand 3 of thetruck and'bod'y bol- 4 sters of a railway cara The bearing has a bottombearing plate lon the truck bolster 2 and a top bearing plate 5 on thebody bolster 3 with an interposed anti-friction roller l 6 between theplates 4 and 5. The roller-6, which is annular in cross section,isloosely mounted within the housing or cage 7 of the bearing, and isarranged to roll onthe" con-- tiguous flat, plane surfaces ofthelbea'ringf-@l plates 4 and 5. Being circular in -crosssection, ltheroller 6 is balanced and willl'liot roll or move, until 'acteduponbysomeout-- side Yforce. y

'opposite sides of the cage, and the top beyars mgv platey 5 on theinterior of'the'cagefis.`

secured to the upper side wall 11 'of the' cage 7. The lower side 12 ofthis cage 7 is iopen and has no wall and the roller 6 piojectsdownwardly through the open side ofthev 'cage into engagement withthebearing" snr-i?"x face of thebottoin bearing plate 4,

fasteneddirectly to the truck bolster.v` v if 'Extending- .througheachside Wallj'8- of the cage'ofFigs. land 2 is an opening'or slot 13with the lower edge 14 of theslot'lA inclined from/both ends toward themiddle of its length', the `proclivous edges Hinten seating a s ho'rtintermediate section 114e,- which ishorizontal.` `The slots inf'f theopposite sidewalls 8,l 8 are in! horizontal il alineme'nt and extendingthrough-these slots and through the opening' 15 inthe hollow v'roller 6isa cylindrical gravity return roller or pin 16, this pin having a head17.011 one which form abutments on the exteriorof the cage 7- and `addweight to the gravity roller pin 16. The'collar 18 is detachably securedon the 'roller 16 by means of a cotter pin y19,

-end and a removable collar 18 onthe other,

which extends through a transverse-'hole in 'f the end of the gravityroller`v` vBy reference to Figs. l and 2, it will be seen that thegravity roller 16 engages with the cylindrical surface of the hole 15 inthe annular roller 6 and with the lower edge-14 ot the slots t3 so thatwhen rela-tive swiveling movement of the bolsters 2 and l occurs and thebalanced'roller t3 is moved thereby, the gravity ietlgyirn roller 1G iscaused to ride upward on tliie inclined edges ,ll ot' the slots lil. 1talso will be readily seen that when the bolster 3 lit'ts clear of theroller (i, that the gravity return roller 1'2 will roll down theinclined edges l-t ot the slots t3 by lgravity, and will automaticallyengage with and return the bearing roller t5 into its central position,(that shown in t'ull lines iii Figs.

i l and '22 of the drawings).

lt will be obvious that by reversing the, angle ot inclination ot' theslots 1:3 in the side walls S of the cage ot Figs. l and i that theAcage can be fastened tothe truck bolster instead ot to the body bolsterY. as shown, and

the bearing thereby made applicable tot' use as a truck bearing insteadot' a body bearing. In the modified construction ot' Figs, 3 and l, thebearing is operatively mounted between end portions 2 and :l ot thetruck bolster and body bolster and has-a bottom bearing plate t and topbearing plate 5 with an annular, balanced roller t between thecontiguous wtarin'gsurfaces ot the plates 4. and 5. i

llvlien the travel or relative swiveling' iiiovelneiit ot' the bolstersL and 2* is great enough. the roller t3 preferably will be in the.t'orni of a hollow truncated cone and the included angle. between thewearing 'taees ot' the bearingiplates -l and 5 will he the same as thato'l such tapering, anti-trici ion rolleig' as shown in lt`igs. Il and-l.

The cage. T ot this bearing is secured by the flanges 10, 1t) on thelsides-thereof to the truck bolster 2, instead ot'l (as in. Figs. l andto the body bolster I. and the bottom bearing plate Jf'is 'tasteneih ontheinterior got' the cage` to the wall toi'iiiing` the, lower side l2 ot.this cage. The upper side ll ol this cageI has no wall7 the roller t3proji-eting upwardly above the cage, iii position to be operativelyengaged by the wearing surt'aeeI oiu the top bearing plate Obviouslyboth the upper side ll and ther` lower side. 4l2 olC the cages in eithertorni el' side. bearing may be made open instead ol only one as shown`in such case both bearing plates Vt and 5 being fastened directly tothe, holsters 2 and 3.

lInstead ot having proclivous slots til extending through iie side wallsH. S ot' the bearing- (like those shown in Figs. l 'and 2), the, sidelwalls S, S of the bearing ol' Figs. i and 4 have recessed .slots lC-lwhich extend outwardly from the, inner surtaces ot the, vertical SideWalls S. (See Fig. t). The lower edges Het the recessc t are in elinedtrom thel outer ends toward the middle ot the length thereof andintersect. with a horizontal section ll thereot.. in the same manner asin Figs. l and A cylindrical gravity. roller or pin itl extends throughthe hollow roller t5 ot Figs. 25 and l and its ends extend loosely intothe opposite .recessed slots 13 in the side walls S, S. A hole 20 vlinone side wall bprovides means for the insertion ot' the pin lowithintlie cage and roller iii assembling the parts, this hole beinglocated at some distance above the axis ot' the piii'lti when in centralposition on the wearing surt'ace ot' the bearing plate l. (See Fig. 3).0n account of havinga closed lower side or bottom l2 the end walls t),il ai'e provided with openings 2l. and the side wallsI S with openings Lwhich permit dirt, snow` ice and similar toi-eign iiiateiials t'romaccumulating within the cagei" and-eti the winning, surface otbtltebearing' plate -l.

.body bolster l moves downwardly into engagement with the roller t3 andthe tr'iiclt swivels under the air. tbe roller ti travels on the bottombearing plate l toward the one end or the other ot the bearing platestt'ioward or into the position shown dotted iii Figs. '2 and -tl andatl'oids a b'ea'iing tor the body bolster which is substaiitiztlllywithout friction.

In traveling toward the end ot the bearing plateV t, the roller t3engages the. gravity roller or piu lt and moves it toward one end o't"the slots 13 in the side walls ot' the cage i', the inclined lower edgell. ot the slots causing the gravity pin lt to lit't or roll upwardly.this movement ot the pin also being etlected without. any substantialamount of friction. A As soon as the body bolster 3 lifts and the'roller t5 is thereby treed the pin rolls baeltwardly down the inclinedlower edges l-t ot the slots ll and by engagement. with the'balanced,anti-friction roller ti, moves` it back until in substantially itscentral posi tion. ln this way the roller t3 is always atit'omaticallymoved back into Central position whenever the Iar right-s itseljt' andpro- 'vides the usual clearance ,in the sidei bearings and the roller t5remains in its central position to again receive the load ot the bodybolster and to roll either to the right or the lett, depending upon thedirection et? waysifetfurn to the mathematicalCenter ot" the bearingplate, which results in the wear y I ,l and l are cleared and Bev makingthe edges 14 horizoiineedles being loosely mounted in the cage with onlya frlctional engagement between them, the

- considerable amountv of jolting.` to' which 4irailway cars aresubjected will cause the r-.rller 6 to turn Slightly from time to timeand in this way present different portions of its periphery'to the.bearing plate, so'that .wear -in spotswon the roller and` bearing platesis avoidedand overcome. 5; Withfside-bearings embodying the novelfeatures ofmy invention as shown the bal-k anced. roller has a rollingcontact with the wearing faces of the, bearing plates-and having adi'erentialmovement, the travel or I bodily movement is very shortcompared to the swiveling movement of the truck and fbody holsters ofthe car. The balanced v'roller of Figs. 3 and 4 may be cylindricalinstead of a truncatedl cone as shown and the gravity roller or pinalsomay be cylindrical when found necessary or.` desirable.- @My improvedside bearing is of simple construction, is strongi and durable and iseasily and cheaply constructed and the wearing parts `are readily madefrom stock sizes of merchant steel.

The bearing roller is secured to the cage in a simple manner whichenables the roller to turn freely and present different surfaces tocontact with the bearing plates and the friction is reduced to aminimum.

Many modifications, which `will suggest themselves to those skilled inthe art, may be made in the detailed construction of the side bearingswithin the scope of the ap'` pended claims.

4lll/'hat I claim is:

1. An anti-friction side bearing comprising upper and lower bearingplates, an interposed circular roller, vertical walls associated wi-t`one of said bearing plates and provided-wi h guides`inclined from bothends toward the center thereof, and afgravity returning member looselyengaging said roller and said guides and v'arrangetl to return saidroller to near the central position.

9. An anti-friction side bearingmompnising upper and lower bearingplates, 1aninterposed circular roller, side walls associated with one ofsaid bearing plates and -provided with guides -inclined from both endstoward the center thereof, and a weighted centeringimember operativelyengaging saidf guides und loosely engaging said roller.

3. An anti-friction side bearing comprising upper and lower bearingplates, an interposed annular roller, forming a hollow anti-frictionmember, side walls associated with one of said bearing plates andprovided v'f'ith grooves inclined from 'both ends :to .the cents, and agravity return roller roller into its central position anda caneoperatively engaging said guides and extending through said hollowroller. 4. An antii1iction side bearing comprising upper andlowerbearing plates, an intei-posed annular roller forming a hollowcircular anti-friction member, side walls associa-ted with one ofsaidbearing pla-tes and provided with grooves` inclined from both endsltoward the center, and a weighted guide pin projecting through theroller and through said grooves and provided 'with abutments at bothends outsideof-said side walls. v7

5.. An anti-friction side bearing .compris ing upper and lower bearingplates, an interposed annular roller 'forming a hollow circularanti-friction member, side walls asl sociated with one of saidvlbearingplates and provided with guides inclined from both ends pto the center,landa circular roller returning member vin rolling engagement with saidguides and loosely7 engaging said roller from the inside. i yv I 6. Ananti-friction side bearing' compris ing upper and lower bearing plates,an interposed hollow circular roller forming an annular antiirictionmember, a cage hav"- ing side walls associated with one of 'said bearingplates and provided with guide slots inclined from both ends towardI thei center, and a circular pin extending thrdugli said hollow roller andthrough said slots and in rolling' engagement with said slots and'provided at its ends exteriorly of the side walls withenlargenients.

7. An anti-friction side bearing compris-3n ing upper and lower bearingplates, an in terposed balanced roller adapted to opera tively engagewith Ysaid bearing plates, a" gravity return roller adapted to engage aV"th and automatically maintain the balanced s. in which said rollersare operatively mounted.

8. An anti-friction side bearing comprising upper and lower bearingplates, an an: nular balanced rel-ler between said Aing plates, agravity return roller extending through the annular roller, acage-inwhich siaid rollers are operatively mounted and means on the side wallsof the cage engag- 'ing with the gravity return roller and coactingtherewith to maintain the annular .roller-f in its central position.

plates, l tical walls associated with the lower bearing plate andprovided with guides inclined from both ends to the center, and a rollerreturning member loosely engznqing,` said roller and said guides andarranged by 4gravity to return said roller to near the central position.

11. In an anti-friction side bearing, the

combination with upper and lower bearing plates, of an interposedcircular roller` side Iwalls associated with the lower bearing' plateand provided with guides inclined from both ends to the center, and aweightl of an interposed :ircular roller, ver4 walls associated with thelower bearing plate and provided with guides inclinedl from both ends tothe center, and a circular roller-returning member in rolling engagementwith said guides and loosely engaging-said roller from the inside.

.13, In ana-nti-friction side bearilw', the combination of a housingarranged for at'- tachment to the truck bolster and provided with abearing' surface and openings at the level of said surface, a circularroller, the side walls, of said housing being provided with guidesinclined frolnboth ends to the center, and va roller-returning memberloosely engaging said roller and said `guides and arranged by gravity toreturn said roller to near tliecentral position.

In testimony whereof I have hereunto set my hand.'

ALBERT W. CALVIN.,

